NEW YORK ( TheStreet) -- Analysts anticipate ReneSola ( SOL), Suntech Power ( STP), Trina Solar ( TSL), Yingli Green Energy Holding Company ( YGE), and JA Solar Holdings ( JASO) to see upsides in the range of 20%-99% during 2011.In comparison, integrated oil and gas majors Exxon Mobil ( XOM), Total ( TOT), BP ( BP), ConocoPhillips ( COP), and Chevron ( CVX) have upsides in the range of -4% to 16% according to the consensus estimates of 12-month target prices. The U.S. administration recently extended subsidies for solar and wind projects under the Treasury Grant Program, a popular incentive for renewable energy projects. The program, scheduled to expire on December 31, was considered an important buffer for the alternative energy industry during the recession. The U.S. government's move will fortify the global renewable energy market, say analysts. Industry analysts believe that the sector's long-term prospects are intact. According to Clean Edge, a research and advisory firm dedicated to the clean energy sector, annual revenues for the global solar, wind, and biofuels sectors were around $125 billion during 2008 and grew to around $145 billion in 2009, despite the global economic slowdown. Clean Edge estimates revenues from the three sectors at around $343.4 billion within the next decade with solar photovoltaic revenues growing from the current $36 billion to $117 billion, while the biofuels segment could surge from $45 billion to $113 billion, and wind power from $64 billion to $114 billion. Analysts are positive on the prospects for solar energy. Nimal Vallipuram, analyst at Gilford Securities says, "While acknowledging the concern bedeviling the EU, we are of the firm opinion that 2011 global solar demand will not disappoint. Despite the perceived dislocations in state sponsorships, we forecast the global demand to be around 18GW in 2011 and around 15GW in 2010." Ardour Global Alternate Energy Index, the benchmark for the alternative energy industry, outperformed global stock markets during 2007 and early 2008; however, post-crisis, clean energy stocks underperformed the global as well as the U.S. indices. Strong demand potential for alternative energy sources will help these five stocks deliver handsome returns to investors.